Are Ugnd and Gnd isolated from each other on ATMega32U4?

hi,

i wondering if gnd , ugnd pins isolated internally each other on atmega32u4?

the reason asking isolate gnd , usb ground on board , wondering if atmega without having go specific usb isolator?

any info appreciated.

thanks

lee

no, do not isolate ugnd gnd.

refer leonardo schematic.

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